What was the most likely diagnosis

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A 35-year old mentally retarded man died. His brain showed atrophy of the gyri and histologic features indistinguishable from those of Alzheimer disease. He had a chromosomal abnormality (trisomy 21). What was the most likely diagnosis?

A) Cerebral palsy
B) Duchene's Muscular dystrophy
C) Mysthenia gravis
D) Myotonic dystrophy
E) Down syndrome

Reference no: EM13100082

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